直流偏磁抑制装置接入对线路距离保护的影响分析  

Influence of Grid-Connected DC Suppression Device on Distance Protection of Transmission Line

作　　者：郑涛 朱先启 韩东伟 刘连光 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2013年第2期545-550,共6页Power System Technology

基　　金：国家973重点基础研究发展计划(2012CB215206);中央高校基本科研业务费专项资金资助(JB2011011)~~

摘　　要：讨论了常见的电阻型与电容型直流偏磁抑制装置接入电网对线路距离保护产生的影响。通过分析不同类型、不同数量的直流偏磁抑制装置接入电网时,距离保护特别是附加测量阻抗的变化情况,得出结论:电阻型直流偏磁抑制装置接入对线路距离保护的影响较为复杂,影响程度与装置的数量、接入位置以及故障点的位置均有关系,在某些特定情况下,单一偏磁抑制装置与多个偏磁抑制装置产生的影响具有一定相似性;相比较而言,无论是从接入数量还是接入位置看,电容型直流偏磁抑制装置对线路距离保护的影响均较小。The influence of grid-connected common resistance-type and capacitance-type of DC bias suppression devices on distance protection of transmission line is analyzed.Several conclusions are obtained by analyzing the performance of distance protection,especially the variation of the additional measured impedance when different types and quantities of DC bias suppression devices are connected to power grid.The influence of grid-connected resistance-type of DC bias suppression device on distance protection,which is related to quantities and grid-connected positions of DC bias suppression device as well as the position of fault point,is complicated.Under certain circumstance,the influence of a single DC bias suppression device is similar to that of multi DC bias suppression devices.Compared with the resistance-type of DC bias suppression device,the capacitance-type has a relatively less effect upon the distance protection of transmission line considering both the quantity and grid-connected position of DC bias suppression device.

关 键 词：距离保护 电阻型 电容型 偏磁抑制装置 附加测量阻抗 

分 类 号：TM773[电气工程—电力系统及自动化]